将MultipartFileData文件保存到磁盘 [英] Save MultipartFileData file to disk

问题描述

我有teh bellow代码，我在其他线程在这里看到，但它没有实际显示如何保存一个MultipartFileData文件到磁盘一旦你有它。

I have teh bellow code which I have seen in other threads here, but nowhere does it actually show how to save a MultipartFileData file to disk once you have it.

    [HttpPost]
    public Task<HttpResponseMessage> PostFormData()
    {
        // Check if the request contains multipart/form-data.
        if (!Request.Content.IsMimeMultipartContent())
        {
            throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
        }

        string root = HttpContext.Current.Server.MapPath(Settings.AssetImageTempStorage);
        var provider = new MultipartFormDataStreamProvider(root);

        // Read the form data and return an async task.
        var task = Request.Content.ReadAsMultipartAsync(provider).
            ContinueWith<HttpResponseMessage>(t =>
            {
                if (t.IsFaulted || t.IsCanceled)
                {
                    Request.CreateErrorResponse(HttpStatusCode.InternalServerError, t.Exception);
                }

                // This illustrates how to get the file names.
                foreach (MultipartFileData file in provider.FileData)
                {


                    // HOW DO I SAVE THIS FILE TO DISK HERE ???


                    Trace.WriteLine(file.Headers.ContentDisposition.FileName);
                    Trace.WriteLine("Server file path: " + file.LocalFileName);
                }
                return Request.CreateResponse(HttpStatusCode.OK);
            });

        return task;
    }

感谢，
Andrei

Thanks, Andrei

推荐答案

以下是在服务器中保存文件的示例。希望这将帮助你。

Here is the sample for saving file in server. Hope this will help you.

public class TestController : ApiController
{
    const string StoragePath = @"T:\WebApiTest";
    public async Task<HttpResponseMessage> Post()
    {
        if (Request.Content.IsMimeMultipartContent())
        {
            var streamProvider = new MultipartFormDataStreamProvider(Path.Combine(StoragePath, "Upload"));
            await Request.Content.ReadAsMultipartAsync(streamProvider);
            foreach (MultipartFileData fileData in streamProvider.FileData)
            {
                if (string.IsNullOrEmpty(fileData.Headers.ContentDisposition.FileName))
            {
                return Request.CreateResponse(HttpStatusCode.NotAcceptable, "This request is not properly formatted");
            }
            string fileName = fileData.Headers.ContentDisposition.FileName;
            if (fileName.StartsWith("\"") && fileName.EndsWith("\""))
            {
                fileName = fileName.Trim('"');
            }
            if (fileName.Contains(@"/") || fileName.Contains(@"\"))
            {
                fileName = Path.GetFileName(fileName);
            }
            File.Move(fileData.LocalFileName, Path.Combine(StoragePath, fileName));
        }
        return Request.CreateResponse(HttpStatusCode.OK);
    }
    else
    {
        return Request.CreateResponse(HttpStatusCode.NotAcceptable, "This request is not properly formatted");
    }
}

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